Technical vocabulary in English : complete course

When you reach an advanced stage in English, you start encountering words and phrases that belong to specific fields — medicine, law, technology, finance, and more. Technical vocabulary in English refers to specialised words and expressions used in a particular domain or profession. These terms are not common in everyday conversation, but they are essential if you want to communicate effectively in a professional or academic context.

Think of it this way: a general English speaker knows the word ‘heart’, but a medical professional uses terms like ‘myocardial infarction’ or ‘cardiovascular system’. Both refer to the same area, but the level of precision is very different.

Simple examples to illustrate

• In medicine: ‘hypertension’ instead of ‘high blood pressure’
• In law: ‘tort’ to describe a civil wrong that causes harm
• In technology: ‘bandwidth’ to describe data transfer capacity
• In finance: ‘liquidity’ to describe how easily assets can be converted to cash

These words are precise, professional, and widely used in written and spoken English in their respective fields.

The key elements of technical vocabulary in English

Technical vocabulary is not just a list of difficult words. It has structure, logic, and patterns. Understanding these patterns will help you learn new terms faster and use them correctly.

1. Word roots, prefixes, and suffixes

Many technical words in English come from Latin or Greek roots. Learning these roots helps you guess the meaning of new words.

For example, if you know that ‘cardio’ means heart and ‘vascular’ means related to blood vessels, you can understand ‘cardiovascular’ without looking it up.

2. Collocations in technical language

Technical vocabulary often comes in fixed combinations called collocations. Using the wrong combination sounds unnatural to native speakers.

• ‘Conduct research’ — not ‘do research’ in formal academic writing
• ‘Submit a report’ — not ‘give a report’ in professional contexts
• ‘Run a test’ — common in science and technology
• ‘File a claim’ — used in legal and insurance contexts

3. False friends and tricky terms

Some technical words look similar to everyday words but have a completely different meaning in a specific domain.

• ‘Net’ in finance means ‘after deductions’, not a fishing net
• ‘Resolution’ in IT refers to screen quality, not a personal decision
• ‘Brief’ in law is a written legal argument, not something short

Why technical vocabulary in English matters

You might wonder: ‘Why do I need to learn all these specialised words?’ Here are several good reasons.

• Professional credibility: Using the right terminology shows you know your field. It builds trust with colleagues and clients.
• Academic success: University essays, reports, and presentations require precise language. Vague words can weaken your arguments.
• Global communication: English is the international language of science, business, and diplomacy. Knowing technical English opens doors worldwide.
• Better comprehension: Reading articles, reports, or manuals becomes much easier when you understand the specific vocabulary.

Comparison with other languages

One interesting feature of English technical vocabulary is how it compares to French and Spanish, which also have rich professional lexicons.

As you can see, many technical terms in English share Latin or Greek roots with French and Spanish. This means that if you already know one of these languages, you have a real advantage when learning English technical vocabulary. However, be careful — ‘false friends’ can mislead you. For example, ‘sensible’ in English means ‘reasonable’, while ‘sensible’ in French means ‘sensitive’.

A complete example

Let us look at a short paragraph from a business report and identify the technical vocabulary:

‘The company reported a significant increase in net revenue despite reduced liquidity in Q3. The board has approved a new restructuring plan to improve operational efficiency and reduce overhead costs.’

• net revenue — income after deductions
• liquidity — the ability to meet short-term financial obligations
• Q3 — abbreviation for the third quarter of the financial year
• restructuring — reorganising a company to improve performance
• operational efficiency — doing business activities with minimal waste of resources
• overhead costs — regular business expenses not directly linked to production

This short paragraph uses six technical terms. Without knowing them, the meaning of the text is almost completely lost.

Key takeaways

• Technical vocabulary refers to specialised words used in a specific professional or academic field.
• Learning word roots, prefixes, and suffixes helps you understand and remember new terms more easily.
• Collocations are essential — technical words often appear in fixed combinations.
• Be careful with false friends, especially if you already know French or Spanish.
• Technical English is essential for professional credibility, academic success, and global communication.
• Reading authentic texts in your field — reports, articles, manuals — is one of the best ways to build your technical vocabulary naturally.

Sources

• Nation, I.S.P. (2001). Learning Vocabulary in Another Language. Cambridge University Press.
• Coxhead, A. (2000). ‘A New Academic Word List’. TESOL Quarterly, 34(2), 213–238.
• Swales, J.M. and Feak, C.B. (2012). Academic Writing for Graduate Students. University of Michigan Press.